Arm-rest



(No Model.)

A. B. DICK.

ARM REST.

No. 403,652. Patented May 21, 1889.

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A R M R E S T SPECIFICATION forming part of Letters Patent No. 403,652,dated May 21, 1889.

Application filed November 24, 1888. Serial No. 291,827. (No model.)

To all whom it may concern:

Be it known that I, ALBERT B. DICK, residing at Chicago, in the countyof Cook and State of Illinois, and a citizen of the United States, haveinvented a new and useful Improvement in Arm-Rests, of which thefollowing is a specification, reference being had to the accompanyingdrawings, in which Figure 1 is a perspective view showing the arm-restin one position and by dotted lines indicating it in another position.Fig. 2 is an under side view, the base being part-1y broken away. Fig. 3is a side elevation. Fig. 4 is an end elevation.

In writing in thick bookssuch as ledger-s and record-booksit is founddesirable to have a support for the arm when writing on the lower linesof the page.

The object-of this invention is to provide an arm rest or support withimproved devices by which its height-can be adjusted to suit thethickness of the book to be written in, which I accomplish asillustrated in the drawings and hereinafter described. \Vhat I claim asnew will be pointed out in the claims.

In the drawings, A represents the base, which in use rests on the deskor table and on which the lower end of the book to be written in rests.

B is the arm-rest.

C O are two parallel rods which support the arm-rest B. Each red O, asshown in Fig. 4, has its ends bentat right angles to the main portion,the lower end being bent in the opposite direction from the upper end.The lower bent portion of each rod 0 is inserted in a hole in the base Aand is held therein by a pin which fits into a groove in the end of thered, as indicated in dotted lines at a in Fig. 4. The upper bent portionof each rod G is placed in a bearin g, c, secured to the under side ofthe arm-rest B, and has a circular rack,b, secured 011 its end.

(1 d are two spring-pawls, one to engage with each rack b.

D is a rock-shaft which is mounted in bearings g, secured to the underside of the armrest B. The end of the shaft D projects be yond the edgeof the arm-rest B and is bent to form a handle, 6. This rock-shaft D isalso provided with two arms, f, adapted to engage with the pawls (Z andlift them out of engagement with the racks Z). The bearings g for therock-shaft D are located near the arms f,

to prevent any endwise movement of the rockshaft, and each is providedwith a shoulder, against which shoulders the arms f strike, limiting therotary movement of the rockshaft.

h h are two pins or stops secured to the base A, against which the rodsC C strike, limiting the descent of the arm-rest B.

In use the base A is to be placed on the desk or table and the lower endof the book to be written in placed thereon. The armrest B can be raisedto the level of the page to be written on by simply lifting it, theparal lel rods 0 keeping it parallel with the base A, as shown in Fig.3, and the arm-rest is antomatically locked in the position to which itis raised by the engagement of the pawls cl with the racks Z) on theends of the parallel rods 0, as shown in Fig. 3.

\Vhen it is desired to lower the arm-rest B, the pawls (Z are disengagedfrom the racks b by pressing down on the handle 6, which rocks the shaftD, causing the arms f to lift the pawls (l. The arm-rest B can then belowered to any desired position. \V hen the pressure is removed from thehandle 6, the springpawls (Z automatically engage with the racks I) andlock the arm-rest B in the desired position.

The arm-rest B furnishes a firm support for the arm, because the bookrests on the base A, and it can be readily and quickly adjusted, asabove described, to suit a book of any thickness.

What I claim as new, and desire to secure by Letters Patent, is

1. A base, A, adapted to be placed beneath a book, and an arm-rest, B,in combination with parallel rods C C, bent at right angles at theiropposite ends, which are pivoted one to the base and the other to thearmrest, racks l), and pawls (Z, substantially as specified.

2. A base, A, adapted to be placed beneath a book, and an arm-rest, B,in combination with parallel rods O (l, bent at right angles at theiropposite ends, which are pivoted one to the base and the other to thearnrrest, racks b, pawls (Z, and rock-shaft D, having arms f,substantially as and for the purpose specified.

ALBERT 1-3. DICK.

\Vitnesses:

ALBERT H. ADAMs, HARRY 'l. JONES.

